They have no more carcinogens in them than do FDA approved nicotine patches. In the 5 years that they have been on the global market, there have been no reports of serious health problems or deaths reported. Many users of e-cigs find that they completely stop smoking tobacco cigarettes and use their e-cigs only. This only means that they stop smoking tobacco cigarettes they do not stop using nicotine, which they receive from the use of their e-cigs.
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